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From:
Arch Intern Med. Author manuscript; available in PMC Sep 21, 2012.
Published in final edited form as:
Arch Intern Med. Jan 25, 2010; 170(2): 170–178.
doi: 10.1001/archinternmed.2009.494
Table 2
Mean values (SDs) for outcome measures.
Variable *BaselineMid-PointFinal
Mean (SD)Mean (SD)Mean (SD)
2x RTn=52n=51n=46
Stroop CW – Stroop C (sec)45.02 (15.8)46.08 (17.2)40.88 (14.9)**
Trail B – Trail A (sec)49.53 (36.6)41.66 (30.8)38.72 (33.6)
Digit Forward – Digit Backward3.40 (2.4)4.12 (2.9)3.82 (2.1)
Gait Speed (m/sec)1.16 (0.2)1.34 (0.2)1.41 (0.2)
1 RM (N)314.97 (66.9)380.61 (84.0)388.20 (82.4)
Peak Muscle Power (W)624.88 (194.2)707.24 (171.6)**708.56 (161.2)**
% Δ Whole Brain Volume from Baseline§N/A−0.02 (0.60)−0.43 (0.65)**
1x RTn=54n=49n=47
Stroop CW – Stroop C (sec)47.37 (26.2)46.46 (25.8)39.49 (14.1)**
Trail B – Trail A (sec)41.35 (26.5)36.13 (27.8)34.05 (27.4)
Digit Forward – Digit Backward3.52 (2.0)3.83 (2.3)3.38 (1.9)
Gait Speed (m/sec)1.17 (0.2)1.36 (0.2)1.37 (0.2)
1 RM (N)323.94 (63.2)371.00 (86.4)386.48 (97.0)
Peak Muscle Power (W)679.30 (184.2)633.37 (192.3)622.26 (204.4)
% Δ Whole Brain Volume from Baseline§N/A−0.04 (0.48)−0.32 (0.54)**
BATn=49n=44n=42
Stroop CW – Stroop C (sec)43.98 (15.1)49.23 (19.1)43.77 (18.9)
Trail B – Trail A (sec)47.12 (41.3)43.37 (28.8)35.98 (21.9)
Digit Forward – Digit Backward3.25 (2.5)4.35 (2.8)4.00 (1.9)
Gait Speed (m/sec)1.17 (0.2)1.33 (0.2)1.37 (0.2)
1 RM (N)338.18 (70.4)363.91 (77.4)356.33 (85.3)
Peak Muscle Power (W)660.30 (229.7)649.52 (208.8)552.08 (194.0)
% Δ Whole Brain Volume from Baseline§N/A0.13 (0.67)0.00 (0.63)
*Stroop CW = Stroop colour-words condition; Stroop C = Stroop coloured-X’s condition; N = newtons; W = watts; m/sec = meters per second.
**Significantly different from the BAT group at p<0.05.
For Stroop Test, 95% CI of difference between 1x RT and BAT = −13.8 to −2.5 and 95% CI of difference between 2x RT and BAT = −12.2 to −0.8.
For peak muscle power, 95% CI of difference between 2x RT and BAT at mid-point = 22.2 to 151.3 and 95% CI of difference between 2x RT and BAT at trial completion = 81.7 to 230.0.
For % Δ in whole brain volume, 95% CI of difference between 1x RT and BAT = −0.76 to −0.04 and 95% CI of difference between 2x RT and BAT = −0.89 to −0.12.
2x RT baseline n=31, mid-point n=26, final n=25; 1x RT baseline n=30, mid-point n=28, final n=27; BAT baseline n=27, mid-point n=21, final n=24.
2x RT baseline n=30, mid-point n=23, Final n=25; 1x RT baseline n=29, mid-point n=26, final n=27; BAT baseline n=27, mid-point n=21, final n=24.
§2x RT % Δ in whole brain volume from baseline to mid-point n=18, % Δ in whole brain volume from baseline to final n=18; 1x RT % Δ in whole brain volume from baseline to mid-point n=28, % Δ in whole brain volume from baseline to final n=28; BAT % Δ in whole brain volume from baseline to mid-point n=20, % Δ in whole brain volume from baseline to final n=18.